December weather forecastSherborn, MA
December
Weather in December
The first month of the winter, December, is also an icy month in Sherborn, Massachusetts, with an average temperature fluctuating between 39°F (3.9°C) and 28°F (-2.2°C).Temperature
The onset of December introduces a moderate change in Sherborn's weather, with average high-temperatures falling from November's chilly 49.1°F (9.5°C) to a cold 39°F (3.9°C). December sees the temperature falling to a mean low of 28°F (-2.2°C).Humidity
The average relative humidity in December is 77%.Rainfall
In Sherborn, in December, during 10.1 rainfall days, 2.83" (72mm) of precipitation is typically accumulated. Throughout the year, there are 157.5 rainfall days, and 29.53" (750mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Sherborn, Massachusetts, in December, during 4.7 snowfall days, 3.62" (92mm) of snow is typically accumulated. In Sherborn, Massachusetts, during the entire year, snow falls for 28.8 days and aggregates up to 17.32" (440mm) of snow.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:55 am and sunset at 4:14 pm. On the last day of December, sunrise is at 7:14 am and sunset at 4:23 pm EST.
Sunshine
In December, the average sunshine is 5h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Sherborn. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Sherborn, MA
- Average high temperature in December: 39°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (33.1°F).
- Average low temperature in December: 28°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure in December
Sherborn, MA
- Average pressure in December: 30.04"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Sherborn, MA
- Average wind speed in December: 8.2mph
The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in December
Sherborn, MA
- Average humidity in December: 77%
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (70%).
Average rainfall in December
Sherborn, MA
- Average rainfall in December: 2.83"
The wettest month (with the highest rainfall) is April (2.87").
The driest month (with the least rainfall) is September (1.54").
Average rainfall days in December
Sherborn, MA
- Average rainfall days in December: 10.1 days
The month with the highest number of rainy days is July (18.4 days).
The month with the least rainy days is January (7.5 days).
Average snowfall in December
Sherborn, MA
- Average snowfall in December: 3.62"
The month with the highest snowfall is February (4.61").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Sherborn, MA
- Average snowfall days in December: 4.7 days
The month with the highest number of snowfall days is February (7.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Sherborn, MA
- Average daylight in December: 9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Sherborn, MA
- Average sunshine days in December: 16 days
The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is June (11 days).
Average UV index in December
Sherborn, MA
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Sherborn, MA
- Average cloud cover in December: 46
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Sherborn, MA
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are February, August and September (5mi).
